Risk factors for prolonged length of stay after first single-level lumbar microdiscectomy.

"Declarations Ethics approvalAll procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Consent to participate/informed consentInformed consent was waived due to the study’s retrospective design. No additional data was collected. The study was approved by the Institutional Review Board of Paracelsus Medical University. Consent for publicationNot applicable. Conflict of interestThe authors declare no competing interests. Conflict of interest The authors declare no competing interests."

"Funding Open access funding provided by Paracelsus Medical University."